Παραπομπή σε μορφή APA (7η εκδ.)

Wekerle, G. R. (1998). Safe Cities Guidelines For Planning, Design And Management Gerda R. Wekerle, Carolyn Whitzman. Van Nostrand Reinhold.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Wekerle, Gerda R. Safe Cities Guidelines For Planning, Design And Management Gerda R. Wekerle, Carolyn Whitzman. Van Nostrand Reinhold, 1998.

Παραπομπή σε μορφή MLA (8th εκδ.)

Wekerle, Gerda R. Safe Cities Guidelines For Planning, Design And Management Gerda R. Wekerle, Carolyn Whitzman. Van Nostrand Reinhold, 1998.