edited by Dagobert D. Runes
Littlefield, Adam & Co., 1963
Buku Referensi
edited by, Frank Gaynor
Philosophical Library, 1953
Buku Referensi
edited by Henry Praty Fairchild
Littlefield, Adams & Co., 1962
Buku Referensi
edited by Harold Benjamin
McGraw-Hill, 1959
Buku Referensi
Himus, Godfrey W., author
Harmondsworth, Middlesex, 1954
Buku Referensi