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. Jakarta: Ghalia Indonesia, 1985.

MLA (9th ed.) Citation

NEGORO, St, and B. HARAHAP. Ensiklopedia Matematika. Ghalia Indonesia, 1985.