edited by The Jaques Cattell Press
R.R. Bowker, 1970
Buku Referensi
edited by The Jaques Cattell Press
R.R. Bowker, 1965, 1966, 1967
Buku Referensi
Lorus, J.
Atheneum, 1962
Buku Teks
Rinehart, 1953
Buku Teks
Ranney, Austin, author
Holt, Rinehart and Winston , 1958
Buku Teks