Dillon, Lawrence S., author
WM.C. Brown, 1976
Buku Teks
Alcock, John, author
Sinauer Associates, 1989
Buku Teks
edited by Peter W. Price ... [and others]
John Wiley & Sons, 1991
Buku Teks
edited by Bernard Stonehouse and Christopher M. Perrins
University Park Press, 1979
Buku Teks
Mayr, Ernst, author
Belknap Press, 1963
Buku Teks