Cita APA (7a ed.)

Carkhuff, R. R. (1983). IPS, interpersonal skills and human productivity. Human Resource Development.

Cita Chicago Style (17a ed.)

Carkhuff, Robert R. IPS, Interpersonal Skills and Human Productivity. Amherst, Massachusetts: Human Resource Development, 1983.

Cita MLA (9a ed.)

Carkhuff, Robert R. IPS, Interpersonal Skills and Human Productivity. Human Resource Development, 1983.