Nemeth, Evi; Snyder, Garth; Seebass, Scott; Hein, Trent (2000). "Printing". UNIX System Administration Handbook. Pearson Education. p. 780. ISBN 978-0-13-700291-7. One of enscript's main claims to fame was its implementation of 2-up printing. 978-0-13-700291-7