edited by D.B. Holt ... [et al.]
Academic Press, 1974
Buku Teks
Meek, Geoffrey A.
John Wiley & Sons, 976
Buku Teks
Fischer, Robert B.
Indiana University Press, 1954
Buku Teks
edited by Jack D. Griffith
John Wiley & Sons, 1982
Buku Teks
edited by J.R. Harris
IRL Press, Oxford:
Buku Teks