APA

United States, . (1968). Bird reactions and scaring devices. [Washington, D.C: .

Chicago

United States, . 1968. Bird reactions and scaring devices. [Washington, D.C: .

Harvard

United States, . (1968). Bird reactions and scaring devices. [Washington, D.C: .

MLA

United States, . Bird reactions and scaring devices. [Washington, D.C: . 1968.