Wheeler, O., & Tenggren, G. (1943). Sing for Christmas: A round of Christmas carols and stories of the carols. E.P. Dutton and Company, Inc..
Čikaški stil citiranja (17. izdanje)Wheeler, Opal, i Gustaf Tenggren. Sing for Christmas: A Round of Christmas Carols and Stories of the Carols. New York, N.Y.: E.P. Dutton and Company, Inc., 1943.
MLA način citiranja (8. izdanje)Wheeler, Opal, i Gustaf Tenggren. Sing for Christmas: A Round of Christmas Carols and Stories of the Carols. E.P. Dutton and Company, Inc., 1943.
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