APA (7e ed.) Bronvermelding

-. (1963). A sense of wonder selections from great writers nature. Doubleday and co.

Chicago (17e ed.) Bronvermelding

-. A Sense of Wonder Selections from Great Writers Nature. New York: Doubleday and co, 1963.

MLA (9e ed.) Bronvermelding

-. A Sense of Wonder Selections from Great Writers Nature. Doubleday and co, 1963.