APA

Paul G. S., . (2016). The princeton field guide to dinosaurs. New jersy: Princeton university press.

Chicago

Paul Gregory S, . 2016. The princeton field guide to dinosaurs. New jersy: Princeton university press.

Harvard

Paul G. S., . (2016). The princeton field guide to dinosaurs. New jersy: Princeton university press.

MLA

Paul Gregory S, . The princeton field guide to dinosaurs. New jersy: Princeton university press. 2016.