APA-referens (7:e uppl.)

Hirt, M. L. (1965). Psychological and allergic aspects of asthma. Thopmas.

Chicago-referens (17:e uppl.)

Hirt, Michael Leonard. Psychological and Allergic Aspects of Asthma. Springfield, IL: Thopmas, 1965.

MLA-referens (9:e uppl.)

Hirt, Michael Leonard. Psychological and Allergic Aspects of Asthma. Thopmas, 1965.