APA-referens (7:e uppl.)

Hansbrough, J. R. (1936). The Tympanis canker of red pine. Yale University.

Chicago-referens (17:e uppl.)

Hansbrough, John Raymond. The Tympanis Canker of Red Pine. New Heaven: Yale University, 1936.

MLA-referens (9:e uppl.)

Hansbrough, John Raymond. The Tympanis Canker of Red Pine. Yale University, 1936.