Clegg, B. (2001). Instant motivation: 79 cara instan menumbuhkan motivas/Brian Clegg, Paul Birch. Erlangga.
Chicago Style (17th ed.) CitationClegg, Brian. Instant Motivation: 79 Cara Instan Menumbuhkan Motivas/Brian Clegg, Paul Birch. Erlangga, 2001.
MLA (8th ed.) CitationClegg, Brian. Instant Motivation: 79 Cara Instan Menumbuhkan Motivas/Brian Clegg, Paul Birch. Erlangga, 2001.
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