APA-čujuhus (7. p.)

Schefler, W. C. (1976). Biology: Principles and issues. Addison - Wesley.

Chicago-čujuhus (17. p.)

Schefler, William C. Biology: Principles and Issues. Reading Mass: Addison - Wesley, 1976.

MLA-čujuhus (9. p.)

Schefler, William C. Biology: Principles and Issues. Addison - Wesley, 1976.

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