Ewing, Galen W. (Galen Wood), author
McGraw-Hill, 1985
Buku Teks
by Hobart H. Willard ... [et al.]
Wadsworth, 1988
Buku Teks
Willard, Hobart H. (Hobart Hurd), 1881-1974, author
D. Van Nostrand Company , 1958
Buku Teks
Harley, John H., author
John Wiley & Sons, 1954
Buku Teks
Skoog, Douglas A., author
Brook/Cole, 2007
Buku Teks