<HARAHAP, I. S. Seri PHT hama palawija. Penebar Swadaya.
Chicago Style (17th ed.) Citation<HARAHAP, Idham Sakti>. Seri PHT Hama Palawija. Penebar Swadaya.
MLA (8th ed.) Citation<HARAHAP, Idham Sakti>. Seri PHT Hama Palawija. Penebar Swadaya.
Warning: These citations may not always be 100% accurate.