APA (7th ed.) Citation

Sheeler, W. D. (1978). Welcome to english 4 ( buku penuntun ). English Language services.

Chicago Style (17th ed.) Citation

Sheeler, Willard D. Welcome to English 4 ( Buku Penuntun ). English Language services, 1978.

MLA (8th ed.) Citation

Sheeler, Willard D. Welcome to English 4 ( Buku Penuntun ). English Language services, 1978.

Warning: These citations may not always be 100% accurate.