Cita APA (7th ed.)
Feibleman, P. S. (1973). The Columbus tree ([1st ed.].). Atheneum.
Cita Chicago (17th ed.)
Feibleman, Peter S. The Columbus Tree. [1st ed.]. New York: Atheneum, 1973.
Cita MLA (9th ed.)
Feibleman, Peter S. The Columbus Tree. [1st ed.]. Atheneum, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.