Gaya APA

Institute, A, P. (1999). Companies Licensed to Used the API Monogram and APIQR ISO 9000 Registration Mark . Washington: American Petroleum Institute.

Gaya MLA

Institute, American, Petroleum. "Companies Licensed to Used the API Monogram and APIQR ISO 9000 Registration Mark". Washington: American Petroleum Institute, 1999. Buku PPs Prodi Teknik Kimia.