Παραπομπή σε μορφή APA (7η εκδ.)

PENN, M. R. (2012). Introduction to Infrastructure: An introduction to civil and environmental engineering / Michael R. Penn, Philip J. Parker. John Wiley.

Παραπομπή σε μορφή Chicago (17η εκδ.)

PENN, Michael R. Introduction to Infrastructure: An Introduction to Civil and Environmental Engineering / Michael R. Penn, Philip J. Parker. John Wiley, 2012.

Παραπομπή σε μορφή MLA (8th εκδ.)

PENN, Michael R. Introduction to Infrastructure: An Introduction to Civil and Environmental Engineering / Michael R. Penn, Philip J. Parker. John Wiley, 2012.