Gaya APA

Gramilich, E, M. (1990). A guide to beneft - cost analysis (2nd.ed.). Englewood Cliffs, New Jersey: Prentice-Hall.

Gaya MLA

Gramilich, Edward, M.. "A guide to beneft - cost analysis". 2nd.ed. Englewood Cliffs, New Jersey: Prentice-Hall, 1990. Text.