Batty, J
The English Languange Book Society, 1979
Buku Teks
Yoder, Dale, author
Prentice-Hall, 1984
Buku Teks
Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1954
Buku Teks
edited by John F. Muth and Gerald L. Thompson, with collaboration of Peter R. Winters
Prentice-Hall, 1963
Buku Teks
edited by Harry W. Karn, B. von Haller Gilmer
McGraw-Hill, 1962
Buku Teks