Phoenix Learning Group (Firm). (2015). Latitude, longitude and time zones (Revised edition.). Phoenix Learning Group.
Citação norma ChicagoPhoenix Learning Group (Firm). Latitude, Longitude and Time Zones. Revised edition. [Place of publication not identified]: Phoenix Learning Group, 2015.
Citação norma MLAPhoenix Learning Group (Firm). Latitude, Longitude and Time Zones. Revised edition. Phoenix Learning Group, 2015.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.