Cavanagh, J. R. (1966). Counseling the invert. Bruce.
Lua i Stíl Chicago (17ú heag.)Cavanagh, John R. Counseling the Invert. Milwaukee, Wisc.: Bruce, 1966.
Lua MLA (8ú heag.)Cavanagh, John R. Counseling the Invert. Bruce, 1966.
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