APA
Smith P., Boyes G., . (1972). Christmas greetings. Sheffield: The Survey of Language and Folklore, University of Sheffield.
Chicago
Smith Paul, Boyes Georgina, . 1972. Christmas greetings. Sheffield: The Survey of Language and Folklore, University of Sheffield.
Harvard
Smith P., Boyes G., . (1972). Christmas greetings. Sheffield: The Survey of Language and Folklore, University of Sheffield.
MLA
Smith Paul, Boyes Georgina, . Christmas greetings. Sheffield: The Survey of Language and Folklore, University of Sheffield. 1972.