APA
Block B., Benjamin J. & Shenk E. (1990). How to be happily employed in Washington, D.C. New York: Random House.
Chicago
Block Barbara, Benjamin Janice and Shenk Ellen. 1990. How to be happily employed in Washington, D.C. New York: Random House.
Harvard
Block B., Benjamin J. and Shenk E. (1990). How to be happily employed in Washington, D.C. New York: Random House.
MLA
Block Barbara, Benjamin Janice and Shenk Ellen. How to be happily employed in Washington, D.C. New York: Random House. 1990.