APA aipamena

o Wilford Olsen. (1967). Animal parasites: Their biology and life cycles (2.). Burgess publihing company.

Chicago Style aipamena

o Wilford Olsen. Animal Parasites: Their Biology and Life Cycles. 2. Burgess publihing company, 1967.

MLA aipamena

o Wilford Olsen. Animal Parasites: Their Biology and Life Cycles. 2. Burgess publihing company, 1967.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.