Gaya APA

2017-09-12, ., 2017-01-03, . (). 289130415 (Textbook). 600: 2017-01-03.

Gaya MLA

2017-09-12, ., 2017-01-03, . "289130415". Textbook 600: 2017-01-03, . 615.321 SIN s.