APA (7th ed.) Citation

Williams, D. W. Admiralty Sailing Directions NP 7A: South America Pilot Volume IV (14th edición.). The United Kingdom Hydrographic Office.

Chicago Style (17th ed.) Citation

Williams, D W. Admiralty Sailing Directions NP 7A: South America Pilot Volume IV. 14th edición. Taunton, Somerset: The United Kingdom Hydrographic Office.

MLA (9th ed.) Citation

Williams, D W. Admiralty Sailing Directions NP 7A: South America Pilot Volume IV. 14th edición. The United Kingdom Hydrographic Office.