d`Alpuget, Blanche
Monkeys in the dark
Aurora Press, 1980
 Buku Teks SO
Freiman, Marcelle
Monkeys wedding / Marcelle Freiman
Island, 1951
 Buku Teks SO
Williams, Duncan
Trousered Apes/Duncan Williams
Delta Book , 1971
 Buku Teks SO
Devaux, Bernard
On the trail of sea turtles
Barron's Educational Series, 2000
 Buku Referensi
Parkman, Francis
The Oregon trail / Francis Parkman
The New American Library, 1961
 Buku Teks SO