Cita APA (7th ed.)

Keller, H. R. e. (1929). The reader's digest of books (New and greatly enl. ed.). Macmillan company.

Cita Chicago (17th ed.)

Keller, Helen Rex ed. The Reader's Digest of Books. New and greatly enl. ed. New York: Macmillan company, 1929.

Cita MLA (9th ed.)

Keller, Helen Rex ed. The Reader's Digest of Books. New and greatly enl. ed. Macmillan company, 1929.