APA-referens (7:e uppl.)

Betz, F., & Holzwarth, C. H. (1933). A second German book. American book company.

Chicago-referens (17:e uppl.)

Betz, Frederick, och Charles Homer Holzwarth. A Second German Book. New York: American book company, 1933.

MLA-referens (9:e uppl.)

Betz, Frederick, och Charles Homer Holzwarth. A Second German Book. American book company, 1933.