Παραπομπή σε μορφή APA (7η εκδ.)

Watt Alec. (1982). Longman illustrated dictionary of geology: The principles of geology explained and illustrated. Longman.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Watt Alec. Longman Illustrated Dictionary of Geology: The Principles of Geology Explained and Illustrated. Longman, 1982.

Παραπομπή σε μορφή MLA (8th εκδ.)

Watt Alec. Longman Illustrated Dictionary of Geology: The Principles of Geology Explained and Illustrated. Longman, 1982.