Hargreaves, G. (1998). Stress management: The essential guide to thinking and working smarter. Marshall Pub.
Dyfyniad Arddull ChicagoHargreaves, Gerard. Stress Management: The Essential Guide to Thinking and Working Smarter. London: Marshall Pub, 1998.
Dyfyniad MLAHargreaves, Gerard. Stress Management: The Essential Guide to Thinking and Working Smarter. Marshall Pub, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.