APA (7th ed.) Citation

Effendi Harahap, A. (1952). Ilmu hitung dagang. Effendiharahap Publ.

Chicago Style (17th ed.) Citation

Effendi Harahap, A. Ilmu Hitung Dagang. Effendiharahap Publ, 1952.

MLA (8th ed.) Citation

Effendi Harahap, A. Ilmu Hitung Dagang. Effendiharahap Publ, 1952.

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