APA (7th ed.) Citation

Perkins, C. R., & Parry, R. B. (1990). Information sources in cartography. Bowker-Saur.

Chicago Style (17th ed.) Citation

Perkins, Chris R., and Robert Brian Parry. Information Sources in Cartography. London [etc.]: Bowker-Saur, 1990.

MLA (9th ed.) Citation

Perkins, Chris R., and Robert Brian Parry. Information Sources in Cartography. Bowker-Saur, 1990.