APA

Walker J. A., . (1991). How the options market works. New Jersey: Prentice Hall.

Chicago

Walker Joseph A, . 1991. How the options market works. New Jersey: Prentice Hall.

Harvard

Walker J. A., . (1991). How the options market works. New Jersey: Prentice Hall.

MLA

Walker Joseph A, . How the options market works. New Jersey: Prentice Hall. 1991.