APA-referens (7:e uppl.)

O'Donnell, M. (1950). Guidebook for Singing wheels: Fourth year (1950 edition.). Row, Peterson and Company.

Chicago-referens (17:e uppl.)

O'Donnell, Mabel. Guidebook for Singing Wheels: Fourth Year. 1950 edition. Evanston, Illinois ; White Plains, New York: Row, Peterson and Company, 1950.

MLA-referens (8:e uppl.)

O'Donnell, Mabel. Guidebook for Singing Wheels: Fourth Year. 1950 edition. Row, Peterson and Company, 1950.