Freyberg, Annabel, author
Laurence King Publishing, ,
Buku Referensi
Van Vlack, Lawrence H., author
Addison-Wesley, 1964
Buku Teks
Waal, Edmund de, author
Guild Publishing, , [date of publication not identified]
Buku Referensi
Chiang, Yet Ming, author
John Wiley & Sons, 1997
Buku Teks
Peterson, Susan, author
Laurence King Publishing, 2000
Buku Referensi