Sheeler, W. D. (1991). Welcome To English 5: Buku Penuntun/ Willard D. Sheeler. Indonesia: English Language Services.Inc..
Cita Chicago Style (17a ed.)Sheeler, Willard D. Welcome To English 5: Buku Penuntun/ Willard D. Sheeler. Indonesia: English Language Services.Inc., 1991.
Cita MLA (8a ed.)Sheeler, Willard D. Welcome To English 5: Buku Penuntun/ Willard D. Sheeler. Indonesia: English Language Services.Inc., 1991.
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