Cita APA (7a ed.)

Howells, W. D., & Gibson, W. M. (1957). A modern instance. Houghton Mifflin.

Cita Chicago Style (17a ed.)

Howells, William Dean, y William M. Gibson. A Modern Instance. Boston: Houghton Mifflin, 1957.

Cita MLA (9a ed.)

Howells, William Dean, y William M. Gibson. A Modern Instance. Houghton Mifflin, 1957.