APA Citation

Ng, B. Y., Ng, G. C., & Wong, S. (1985). Keadaan dunia. Penang: Sahabat Alam Malaysia.

Chicago Style Citation

Ng, Bee Yian, Gan Chee Ng, and Serena Wong. Keadaan Dunia. Penang: Sahabat Alam Malaysia, 1985.

MLA Citation

Ng, Bee Yian, Gan Chee Ng, and Serena Wong. Keadaan Dunia. Penang: Sahabat Alam Malaysia, 1985.

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