APA

Hibbeler R. C, . (2007). Engineering. Singapore: pearson prentice hall.

Chicago

Hibbeler R. C, . 2007. Engineering. Singapore: pearson prentice hall.

Harvard

Hibbeler R. C, . (2007). Engineering. Singapore: pearson prentice hall.

MLA

Hibbeler R. C, . Engineering. Singapore: pearson prentice hall. 2007.