APA-čujuhus (7. p.)
Sibley, C. G. (1950). Species Formation in the red-eyed towhees of Mexico. Univ. of California Pr.
Chicago-čujuhus (17. p.)
Sibley, Charles G. Species Formation in the Red-eyed Towhees of Mexico. Berkeley, Los Angeles: Univ. of California Pr, 1950.
MLA-čujuhus (9. p.)
Sibley, Charles G. Species Formation in the Red-eyed Towhees of Mexico. Univ. of California Pr, 1950.
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