APA (7th ed.) Citation

Gruska, J. Niklaus Wirth, Systematic programming. An introduction.

Chicago Style (17th ed.) Citation

Gruska, Jozef. Niklaus Wirth, Systematic Programming. An Introduction.

MLA (9th ed.) Citation

Gruska, Jozef. Niklaus Wirth, Systematic Programming. An Introduction.

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