APA (7th ed.) Citation

Zoe Sugg. (2014). Girl Online (1st.). Penguin books.

Chicago Style (17th ed.) Citation

Zoe Sugg. Girl Online. 1st. UK: Penguin books, 2014.

MLA (9th ed.) Citation

Zoe Sugg. Girl Online. 1st. Penguin books, 2014.

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