Creighton, Helen
W.B. Saunders Company, 1981
Buku Teks
Bittel, Lester Robert
Tata McGraw-Hill, 1974
Buku Teks
Bittel, Lester Robert
McGraw-Hill, 1968
Buku Teks
Kishore, Swapna
Tata McGraw-Hill, 1991
Buku Teks
Lambert, A. Vickie
Prentice Hall Englewood Cliffts , 1985
Buku Teks