APA-referens (7:e uppl.)

Sprague, E., & Sprague, C. (1926). How to design greeting cards. Bridgman.

Chicago-referens (17:e uppl.)

Sprague, Elizabeth, och Curtiss Sprague. How to Design Greeting Cards. Pelham, N.Y: Bridgman, 1926.

MLA-referens (8:e uppl.)

Sprague, Elizabeth, och Curtiss Sprague. How to Design Greeting Cards. Bridgman, 1926.