edited by Philip E. Sartwell
Meredith Publ., 1965
Buku Teks
editors, John M. Last, Robert B. Wallace ; associate editors, Elizabeth Barrett-Connor [and others]
Appleton & Lange, 1992
Buku Referensi
edited by Philip E. Sartwell
Appleton Century Crofts, 1973
Buku Teks
Penalver, Rafael A.
Arco Publishing, 1984
Buku Teks SO
Penalver, Rafael A.
Arco Publishing, Inc., 1981
Buku Teks SO