(1994). Environment encyclopedia and directory. Europa Pub.
Tohutoru Kātū Chicago (17th ed.)Environment Encyclopedia and Directory. London: Europa Pub, 1994.
Tohutoro MLA (9th ed.)Environment Encyclopedia and Directory. Europa Pub, 1994.
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.