by John Macsai ... [and others] ; illustrator, Alfred J. Hidvegi
Wiley, 1976.
Buku Teks
Lubeck, Steven G.
Aldine Publishing Company, 1971
Buku Teks
Macintyre, Stuart, author
Australian Goverment, 1947
Buku Teks
Christopher Alexander...[et al.]
Oxford University Press, 1975
Buku Teks
Furnivall, JS
Solidaridad publishing house, 1974
Buku Teks