Gaya APA

Towsnsend, R, D, &, G. (1956). Masonry Simplified (Tools, Materials, Practice), Volume I (--). USA: American Technical Society.

Gaya MLA

Towsnsend, Ralph, Dalzell, &, Gilbert. "Masonry Simplified (Tools, Materials, Practice), Volume I". -- USA: American Technical Society, 1956. Text.