Farnsworth, E. Allan, author
Oceana Publication, 1983
Buku Teks
edited by Eduardo P. Archetti
MacMillan Education, 1987
Buku Teks
Szulc, Tad, author
Atheneum, 1966
Buku Teks
Szulc, Tad, author
Atheneum, 1966
Buku Teks
Jose, James R., author
The Scarecrow Press, 1970
Buku Teks