APA-referens (7:e uppl.)

Coolidge, J. G. (1924). Random letters from many countries. Marshall Jones Co.

Chicago-referens (17:e uppl.)

Coolidge, John Gardner. Random Letters from Many Countries. Boston: Marshall Jones Co, 1924.

MLA-referens (9:e uppl.)

Coolidge, John Gardner. Random Letters from Many Countries. Marshall Jones Co, 1924.