APA-čujuhus (7. p.)

Jurek, D., & MacDonald, S. (1989). Discovering the world: Biological science. DLM.

Chicago-čujuhus (17. p.)

Jurek, Dianne, juo Sharon MacDonald. Discovering the World: Biological Science. Texas: DLM, 1989.

MLA-čujuhus (9. p.)

Jurek, Dianne, juo Sharon MacDonald. Discovering the World: Biological Science. DLM, 1989.

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