Gaya APA

Emeleus, H. (Cambridge :Butterwor). Main group elements : group V and VI . Cambridge :Butterworth & Co, 1: Cambridge :Butterworth & Co, 1972.

Gaya MLA

Emeleus, HJ. "Main group elements : group V and VI". Cambridge :Butterworth & Co, 1: Cambridge :Butterworth & Co, 1972, Cambridge :Butterwor. Text.