Gaya APA

Institute, A, P. (2013). Air-Cooled Heat Exchangers for General Refinery Service (API STD 661 Seventh Edition, July 2013 Reaffirmed. June 2018) (Seventh Edition, July 2013). Washington: Washington DC : American Petroleum Inst.,.

Gaya MLA

Institute, American, Petroleum. "Air-Cooled Heat Exchangers for General Refinery Service (API STD 661 Seventh Edition, July 2013 Reaffirmed. June 2018)". Seventh Edition, July 2013 Washington: Washington DC : American Petroleum Inst.,, 2013. Text.