APA (7th ed.) Citation

HARAHAP, A. E. (1980). Ilmu hitung dagang jilid 4. Effendiharahap.

Chicago Style (17th ed.) Citation

HARAHAP, A. Effendi. Ilmu Hitung Dagang Jilid 4. Semarang: Effendiharahap, 1980.

MLA (9th ed.) Citation

HARAHAP, A. Effendi. Ilmu Hitung Dagang Jilid 4. Effendiharahap, 1980.

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