APA (7th ed.) Citation

Harahap, Z., & Wang, T. C. (2006). Sketsa pensil. Erlangga.

Chicago Style (17th ed.) Citation

Harahap, Zulkifli, and Thomas C. Wang. Sketsa Pensil. Erlangga, 2006.

MLA (8th ed.) Citation

Harahap, Zulkifli, and Thomas C. Wang. Sketsa Pensil. Erlangga, 2006.

Warning: These citations may not always be 100% accurate.