APA (7th ed.) Citation

Crystal, R. E. (1992). Study on regional and local planning systems. LDAP.

Chicago Style (17th ed.) Citation

Crystal, R. E. Study on Regional and Local Planning Systems. [s.l: LDAP, 1992.

MLA (9th ed.) Citation

Crystal, R. E. Study on Regional and Local Planning Systems. LDAP, 1992.