APA (7th ed.) Citation

Kropáč, O., & Ljung, L. L. Ljung: System identification: Theory for the user.

Chicago Style (17th ed.) Citation

Kropáč, Oldřich, and L. Ljung. L. Ljung: System Identification: Theory for the User.

MLA (9th ed.) Citation

Kropáč, Oldřich, and L. Ljung. L. Ljung: System Identification: Theory for the User.

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