APA-čujuhus (7. p.)
Estefan, A., Melogno, S., & Portos, R. (1973). Gallbladder cancer: Incidence and pathology: about 175 observations.
Chicago-čujuhus (17. p.)
Estefan, Alberto, Silvio Melogno, juo Roberto Portos. Gallbladder Cancer: Incidence and Pathology: About 175 Observations. 1973.
MLA-čujuhus (9. p.)
Estefan, Alberto, et al. Gallbladder Cancer: Incidence and Pathology: About 175 Observations. 1973.
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