Dyfyniad APA

Chacko, P. E. (1972). Safety engineering (Rev. ed.). Rose Chacko Pachickara.

Dyfyniad Arddull Chicago

Chacko, P. E. Safety Engineering. Rev. ed. Thodupuzha: Rose Chacko Pachickara, 1972.

Dyfyniad MLA

Chacko, P. E. Safety Engineering. Rev. ed. Rose Chacko Pachickara, 1972.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.