APA (7th ed.) Citation

Drake. (2015). If you're reading this it's too late. [Publisher not identified].

Chicago Style (17th ed.) Citation

Drake. If You're Reading This It's Too Late. [Place of publication not identified]: [Publisher not identified], 2015.

MLA (9th ed.) Citation

Drake. If You're Reading This It's Too Late. [Publisher not identified], 2015.