Citazione Stile APA (7a Edizione)
Smithsonian Institution Symposium (16-18 feb. l967). (1968). The quality of man's environment. Voice of American Forum Lectures.
Citazione stile Chigago Style (17a edizione)
Smithsonian Institution Symposium (16-18 feb. l967). The Quality of Man's Environment. United States: Voice of American Forum Lectures, 1968.
Citatione MLA (9a ed.)
Smithsonian Institution Symposium (16-18 feb. l967). The Quality of Man's Environment. Voice of American Forum Lectures, 1968.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.