APA-čujuhus (7. p.)

Barbara Mitchelhill. (2009). PYP L3 Noah's Ark single (Pearson Baccalaureate PrimaryYears Programme). Heinemann.

Chicago-čujuhus (17. p.)

Barbara Mitchelhill. PYP L3 Noah's Ark Single (Pearson Baccalaureate PrimaryYears Programme). Heinemann, 2009.

MLA-čujuhus (9. p.)

Barbara Mitchelhill. PYP L3 Noah's Ark Single (Pearson Baccalaureate PrimaryYears Programme). Heinemann, 2009.

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