APA-referens (7:e uppl.)

(1973). Hopt news: A monthly bulletin by E. Hopt Singapore (Pte) Ltd for its staff. E. Hopt Singapore (Pte) Ltd..

Chicago-referens (17:e uppl.)

Hopt News: A Monthly Bulletin by E. Hopt Singapore (Pte) Ltd for Its Staff. Singapore: E. Hopt Singapore (Pte) Ltd., 1973.

MLA-referens (8:e uppl.)

Hopt News: A Monthly Bulletin by E. Hopt Singapore (Pte) Ltd for Its Staff. E. Hopt Singapore (Pte) Ltd., 1973.