Παραπομπή σε μορφή APA (7η εκδ.)

Johnson, A. I., & Petterson, C. B. (1992). Geographic information systems (GIS) and mapping: Practices and standards. American Society for Testing & Materials.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Johnson, A. I., και C. B. Petterson. Geographic Information Systems (GIS) and Mapping: Practices and Standards. Philadelphia: American Society for Testing & Materials, 1992.

Παραπομπή σε μορφή MLA (8th εκδ.)

Johnson, A. I., και C. B. Petterson. Geographic Information Systems (GIS) and Mapping: Practices and Standards. American Society for Testing & Materials, 1992.