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Gaya APA

Seiwert, L, J. (1993). Mengatur Waktu Secara Efektif (Time is Money : Save it) . Jakarta: Gramedia.

Gaya MLA

Seiwert, Lothar, J.. "Mengatur Waktu Secara Efektif (Time is Money : Save it)". Jakarta: Gramedia, 1993. Text.