APA način citiranja (7. izdanje)
Berrudez Villegas, J., & Kamaid, E. (1982). Anal fissure: Diagnostic and therapeutic considerations with special reference to internal lateral sphincterotomy.
Čikaški stil citiranja (17. izdanje)
Berrudez Villegas, Jorge, i Emil Kamaid. Anal Fissure: Diagnostic and Therapeutic Considerations with Special Reference to Internal Lateral Sphincterotomy. 1982.
MLA način citiranja (9. izdanje)
Berrudez Villegas, Jorge, i Emil Kamaid. Anal Fissure: Diagnostic and Therapeutic Considerations with Special Reference to Internal Lateral Sphincterotomy. 1982.
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