The Professional Car (Quarterly Journal of the Professional Car Society)

Gregg D. Merksamer - Professional Cars: Ambulances, Funeral Cars and Flower Cars

Thomas A. McPherson - American Funeral Cars & Ambulances Since 1900

Carriage Museum of America - Horse-Drawn Funeral Vehicles: 19th Century Funerals

Carriage Museum of America -  Horse Drawn - Military, Civilian, Veterinary - Ambulances

Gunter-Michael Koch - Bestattungswagen im Wandel der Zeit

Walt McCall & Tom McPherson - Classic American Ambulances 1900-1979: Photo Archive

Walt McCall & Tom McPherson - Classic American Funeral Vehicles 1900-1980 Photo Archive

Walter M. P. McCall - The American Ambulance 1900-2002

Walter M.P. McCall - American Funeral Vehicles 1883-2003

Michael L. Bromley & Tom Mazza - Stretching It: The Story of the Limousine

Richard J. Conjalka - Classic American Limousines: 1955 Through 2000 Photo Archive

Richard J. Conjalka - Stretch Limousines 1928-2001 Photo Archive

Thomas A. McPherson - Eureka: The Eureka Company: a complete history

Thomas A. McPherson - Superior: The complete history

Thomas A. McPherson - Flxible: The Complete History

Thomas A. McPherson - Miller-Meteor: The Complete History

Robert R. Ebert  - Flxible: A History of the Bus and the Company

Hearses - Automobile Quarterly Vol 36 No 3

Marian Suman-Hreblay - Dictionary of World Coachbuilders and Car Stylists

Daniel D. Hutchins - Wheels Across America: Carriage Art & Craftsmanship

Marian Suman-Hreblay - Dictionary of World Coachbuilders and Car Stylists

Michael Lamm and Dave Holls - A Century of Automotive Style: 100 Years of American Car Design

Nick Georgano - The Beaulieu Encyclopedia of the Automobile: Coachbuilding

Marian Suman-Hreblay - Automobile Manufacturers Worldwide Registry

G.N. Georgano & G. Marshall Naul - The Complete Encyclopedia of Commercial Vehicles

Albert Mroz - Illustrated Encyclopedia of American Trucks & Commercial Vehicles

Beverly Rae Kimes & Henry Austin Clark Jr. - Standard Catalog of American Cars 1805-1942

John Gunnell - Standard Catalog of American Cars, 1946-1975

James M. Flammang & Ron Kowalke - Standard Catalog of American Cars, 1976-1999