APA Style
Helms, R.S., Doss,M.A and Farr,M.M. (1969).
Index-Catalogue of Medical and Veterinary Zoology (Subject: Trematoda and Trematode Disease, Part 12: Hosts: Genera M-Z) USDA .
Washington,D.C:
United State Government Printing Office.
Chicago Style
Helms, R.S., Doss,M.A and Farr,M.M.
Index-Catalogue of Medical and Veterinary Zoology (Subject: Trematoda and Trematode Disease, Part 12: Hosts: Genera M-Z) USDA.
Washington,D.C:
United State Government Printing Office,
1969.
.
MLA Style
Helms, R.S., Doss,M.A and Farr,M.M.
Index-Catalogue of Medical and Veterinary Zoology (Subject: Trematoda and Trematode Disease, Part 12: Hosts: Genera M-Z) USDA.
Washington,D.C:
United State Government Printing Office,
1969.
.
Turabian Style
Helms, R.S., Doss,M.A and Farr,M.M.
Index-Catalogue of Medical and Veterinary Zoology (Subject: Trematoda and Trematode Disease, Part 12: Hosts: Genera M-Z) USDA.
Washington,D.C:
United State Government Printing Office,
1969.
.