(1970). The environment: A national mission. New York: Perennial Library Harper & Row.
Trích dẫn kiểu ChicagoThe Environment: A National Mission. New York: Perennial Library Harper & Row, 1970.
ציטוט MLAThe Environment: A National Mission. New York: Perennial Library Harper & Row, 1970.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.