Boardman, Harry
Voice of America, 1974
Buku Teks
Mader, Sylvia S.
McGraw-Hill, 2000
Buku Teks
Mader, Sylvia S.
[publisher not identified], [date of publication not identified]
Buku Teks
Mader, Sylvia S.
McGraw-Hill, 2016
Buku Teks
Mader, Sylvia S.
McGraw-Hill, 2018
Buku Teks