APA

United States, . (1973). Problems of predator control: hearings before Subcommittee on Public Lands, 93d Congress, 1st session obtaining factual information on usefulness of various methods of controlling predators, June 1 [and] 4, 1973. [Washington, D.C.]: .

Chicago

United States, . 1973. Problems of predator control: hearings before Subcommittee on Public Lands, 93d Congress, 1st session obtaining factual information on usefulness of various methods of controlling predators, June 1 [and] 4, 1973. [Washington, D.C.]: .

Harvard

United States, . (1973). Problems of predator control: hearings before Subcommittee on Public Lands, 93d Congress, 1st session obtaining factual information on usefulness of various methods of controlling predators, June 1 [and] 4, 1973. [Washington, D.C.]: .

MLA

United States, . Problems of predator control: hearings before Subcommittee on Public Lands, 93d Congress, 1st session obtaining factual information on usefulness of various methods of controlling predators, June 1 [and] 4, 1973. [Washington, D.C.]: . 1973.