APA Style

South Indian Ocean pilot : Comores, Madagascar, Seychelles Group, La Réunion, Mauritius, Chagos Archipelago and other islands lying westward of longitude 90° east. (1990). USA: The Hydrographer Of The Navy.

MLA Style

South Indian Ocean pilot : Comores, Madagascar, Seychelles Group, La Réunion, Mauritius, Chagos Archipelago and other islands lying westward of longitude 90° east. 9th Ed. USA: The Hydrographer Of The Navy, 1990. Text.