CLEMENS, J. K., ALBRECHT, S., & ADIWIYOTO, A. [. (1997). Pemimpin sepanjang masa (The timeless leader). Professional Books.
Chicago-čujuhus (17. p.)CLEMENS, John K., Steve ALBRECHT, juo Anton [pent] ADIWIYOTO. Pemimpin Sepanjang Masa (The Timeless Leader). Jakarta: Professional Books, 1997.
MLA-čujuhus (9. p.)CLEMENS, John K., et al. Pemimpin Sepanjang Masa (The Timeless Leader). Professional Books, 1997.
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