Hegner, Robert W.
Macmillan, 1951
Buku Teks
Gordon, Malcolm S.
Macmillan, 1976
Buku Teks
Miller, Stephen A.
McGraw-Hill, 2016
Buku Teks
edited by by Thomas C. Grubb
Burgess, 1975
Buku Teks
edited by Jeffery Parker, William A. Haswell
Macmillan, 1962
Buku Teks