Holmberg, K. (1991). Mallard ducks: Mate choice and breeding success.
Chicago Style (17th ed.) CitationHolmberg, Kerstin. Mallard Ducks: Mate Choice and Breeding Success. 1991.
MLA (9th ed.) CitationHolmberg, Kerstin. Mallard Ducks: Mate Choice and Breeding Success. 1991.
Warning: These citations may not always be 100% accurate.