Butler, C. (1986). Who are you?: Discovering your real identity. The Science of Identity Institute.
Citace podle Chicago (17th ed.)Butler, Chris. Who Are You?: Discovering Your Real Identity. Makati: The Science of Identity Institute, 1986.
Citace podle MLA (9th ed.)Butler, Chris. Who Are You?: Discovering Your Real Identity. The Science of Identity Institute, 1986.
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