Gaya APA

SARMA, M., HARDJOMIDJOJO, H. (1998). CROP Productivity and sustainability-shapiproceedings of the 2nd International Crop Science Congress . Enfield: Science Publishers.

Gaya MLA

SARMA, Ma'mun., HARDJOMIDJOJO, Hartrisari. "CROP Productivity and sustainability-shapiproceedings of the 2nd International Crop Science Congress". Enfield: Science Publishers, 1998. Buku.