APA (7th ed.) Citation

Merrell, F. (1985). A semiotic theory of texts. Approaches to semiotics.

Chicago Style (17th ed.) Citation

Merrell, Floyd. "A Semiotic Theory of Texts." Approaches to Semiotics 1985.

MLA (8th ed.) Citation

Merrell, Floyd. "A Semiotic Theory of Texts." Approaches to Semiotics, 1985.

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