Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.