APA (7th ed.) Citation
Parry, A., Bartram, M., & Hartle, S. (1989). Penguin elementary writing shills (1.vyd.). Penguin Books.
Chicago Style (17th ed.) Citation
Parry, Anne, Mark Bartram, and Sharon Hartle. Penguin Elementary Writing Shills. 1.vyd. London: Penguin Books, 1989.
MLA (9th ed.) Citation
Parry, Anne, et al. Penguin Elementary Writing Shills. 1.vyd. Penguin Books, 1989.
Warning: These citations may not always be 100% accurate.