APA (7th ed.) Citation

Dik, S. C. (1989). The theory of functional grammar. The theory of functional grammar.

Chicago Style (17th ed.) Citation

Dik, Simon C. "The Theory of Functional Grammar." The Theory of Functional Grammar 1989.

MLA (8th ed.) Citation

Dik, Simon C. "The Theory of Functional Grammar." The Theory of Functional Grammar, 1989.

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