AllenC. (1969). A Textbook of Psychosexual Disorders.Oxford University Press, London.
2.
BancroftJ. (1972). The relationship between gender identity and sexual behaviour: some clinical aspects, In Gender Differences: Their Ontogeny and Significance. (Eds. OunstedC.TaylorD. C.) Churchill Livingstone, London.
3.
BenjaminH. (1966). The Transsexual Phenomenon.The Julian Press, New York.
4.
CauldwellD. O. (1949). Psychopathia transsexualis. Sexology.16: 274–280.
5.
FreundK. (1974). Male homosexuality: an analysis of the pattern, in Understanding Homosexuality: Its Biological and Psychological Basis. (Ed. LoraineJ. A.) Medical and Technical Publications, England.
6.
SimM. (1974). Guide to Psychiatry.Churchill Livingstone, London.
7.
StollerR. J. (1971). The term transvestism. Archieves of General Psychiatry.24: 230–237.