o Wilford Olsen. (1967). Animal parasites: Their biology and life cycles (2.). Burgess publihing company.
Chicago Edition Citationo Wilford Olsen. Animal Parasites: Their Biology and Life Cycles. 2. Burgess publihing company, 1967.
MLA Edition Citationo Wilford Olsen. Animal Parasites: Their Biology and Life Cycles. 2. Burgess publihing company, 1967.
Warning: These citations may not always be 100% accurate.