APA (7th ed.) Citation

Inc, G. I. (1999). Ilmu Pengetahuan Populer 7. PT Widyadara.

Chicago Style (17th ed.) Citation

Inc, Grolier International. Ilmu Pengetahuan Populer 7. PT Widyadara, 1999.

MLA (8th ed.) Citation

Inc, Grolier International. Ilmu Pengetahuan Populer 7. PT Widyadara, 1999.

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