APA (7e ed.) Bronvermelding
Smithsonian Institution Symposium (16-18 feb. l967). (1968). The quality of man's environment. Voice of American Forum Lectures.
Chicago (17e ed.) Bronvermelding
Smithsonian Institution Symposium (16-18 feb. l967). The Quality of Man's Environment. United States: Voice of American Forum Lectures, 1968.
MLA (9e ed.) Bronvermelding
Smithsonian Institution Symposium (16-18 feb. l967). The Quality of Man's Environment. Voice of American Forum Lectures, 1968.
Let op: Deze citaties zijn niet altijd 100% accuraat.