Cita APA (7a ed.)

Gibbs, J. P. (1961). Urban research methods. D. Van Nostrand.

Cita Chicago Style (17a ed.)

Gibbs, Jack P. Urban Research Methods. New Jersey: D. Van Nostrand, 1961.

Cita MLA (8a ed.)

Gibbs, Jack P. Urban Research Methods. D. Van Nostrand, 1961.