Hargreaves, G. (1998). Stress management: The essential guide to thinking and working smarter. Marshall Pub.
Chicago-viite (17. p.)Hargreaves, Gerard. Stress Management: The Essential Guide to Thinking and Working Smarter. London: Marshall Pub, 1998.
MLA-viite (9. p.)Hargreaves, Gerard. Stress Management: The Essential Guide to Thinking and Working Smarter. Marshall Pub, 1998.
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