APA (7th ed.) Zitazioa
Smithsonian Institution Symposium (16-18 feb. l967). (1968). The quality of man's environment. Voice of American Forum Lectures.
Chicago Style (17th ed.) Zitazioa
Smithsonian Institution Symposium (16-18 feb. l967). The Quality of Man's Environment. United States: Voice of American Forum Lectures, 1968.
MLA (9th ed.) Zitazioa
Smithsonian Institution Symposium (16-18 feb. l967). The Quality of Man's Environment. Voice of American Forum Lectures, 1968.
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