Block, J. D. (1996). Secrets of better sex. Parker Pub.
Cita Chicago (17th ed.)Block, Joel D. Secrets of Better Sex. West Nyack, N.Y: Parker Pub, 1996.
Cita MLA (9th ed.)Block, Joel D. Secrets of Better Sex. Parker Pub, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.