Sheeler, W. D. (1991). Welcome to english: Work Book 2/ Willard D. Sheeler; Jean N. Dale; Susan C. Bayley. Indonesia : English Language Services Inc..
Čikaški stil citiranja (17. izdanje)Sheeler, Willard D. Welcome to English: Work Book 2/ Willard D. Sheeler; Jean N. Dale; Susan C. Bayley. Indonesia : English Language Services Inc., 1991.
MLA način citiranja (8. izdanje)Sheeler, Willard D. Welcome to English: Work Book 2/ Willard D. Sheeler; Jean N. Dale; Susan C. Bayley. Indonesia : English Language Services Inc., 1991.
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