Cita APA (7a ed.)

Handy, R., & Harwood, E. (1973). Useful procedures of inquiry. Behavioral Research Council.

Cita Chicago Style (17a ed.)

Handy, Rollo, y E.C Harwood. Useful Procedures of Inquiry. Great Barrington, Mass: Behavioral Research Council, 1973.

Cita MLA (9a ed.)

Handy, Rollo, y E.C Harwood. Useful Procedures of Inquiry. Behavioral Research Council, 1973.