Willoughby, S. S. (1981). Measuring bowser: Thinking story book. Open Court Publishers.
Čikaški stil citiranja (17. izdanje)Willoughby, Stephen S. Measuring Bowser: Thinking Story Book. Illinois: Open Court Publishers, 1981.
MLA način citiranja (9. izdanje)Willoughby, Stephen S. Measuring Bowser: Thinking Story Book. Open Court Publishers, 1981.
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