APA (7th ed.) Citation

Negoro, S., & Harahap, B. (1985). Ensiklopedia matematika. Ghalia Indonesia.

Chicago Style (17th ed.) Citation

Negoro, ST, and B. Harahap. Ensiklopedia Matematika. Ghalia Indonesia, 1985.

MLA (8th ed.) Citation

Negoro, ST, and B. Harahap. Ensiklopedia Matematika. Ghalia Indonesia, 1985.

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