Guenther, Herbert V.
Treasures on the Tibetan Middle way
Shambhala, 1976
 Buku Teks SO
Way, Lawrence W.
Current surgical diagnosis and treatment / Lawrence W. WAY.
California Lange Medical Publ., 1983
 Buku Teks SO
Russ, Sandra W
Play in Child Development and Psychotherapy / Sandra W Russ
Lawrence Erlbaum Assossiate, 2004
 Buku Teks SO
Maier, Henry W
Three theories of child development / Henry W. Maier
Harper and Row, 1978
 Buku Teks SO
Taxation in Sweden
Little, Brown and Co., 1959
 Buku Teks