Lewis, William Draper, author
Michie, 1937
Buku Teks
Welch, Joseph N., author
Houghton Miffiln, 1956
Buku Teks
Knickerbocker, K.L. (Kenneth Leslie), author
Holt, Rinehart and Winston, 1963
Buku Teks
Kaufmann, Magdalena
Springer, 2012
eBooks
K.L. Knickerbocker ... [and others]
Harcourt, Brace Jovanovics College Publishers, 1985
Buku Teks