APA Format
Roy, Ron; Gurney, John Steven. (1998).
The empty envelope / by Ron Roy ; ilustrated by John Steven Gurney
. New York :: A Stepping Stone Book,.
MLA Format
Roy, Ron; Gurney, John Steven.
The empty envelope / by Ron Roy ; ilustrated by John Steven Gurney
. New York :: A Stepping Stone Book,, 1998
Chicago Format
Roy, Ron; Gurney, John Steven. The empty envelope / by Ron Roy ; ilustrated by John Steven Gurney. New York :: A Stepping Stone Book,, 1998.