Openshaw, H.T.
Cambridge University Press, 1962
Buku Teks
Vogel, Arthur I., author
Longman, 1983
Buku Teks
Vogel, Arthur I., author
Longman, 1983
Buku Teks
Vogel, Arthur I., author
Kalman Media Pusaka, 1985
Buku Teks
Siggia, Sidney, author
John Wiley & Sons, 1979
Buku Teks