Gaya APA

Barrington, S. (2002). Mapping the World 2 Observation and Measurement=Memetakan Dunia 2 Pengamatan dan Pengukuran . United Kingdom: Grolier Education.

Gaya MLA

Barrington, Shaun. "Mapping the World 2 Observation and Measurement=Memetakan Dunia 2 Pengamatan dan Pengukuran". United Kingdom: Grolier Education, 2002. Text.