This article is from the Ballet and Modern Dance FAQ, by Tom Parsons email@example.com with numerous contributions by others.
I know of two sources of information. First, "Beginning Ballet", by Joan
Lawson (London: A & C Black, New York: Theatre Arts, 1994, ISBN 0-87830-
056-2), has some simple designs for dance costumes, including a tutu.
Second, Claudia Folts has written a set of four books (see the Reading
List, Section 6.1.12) that provide instructions and patterns. They are
PO Box 472287,
Charlotte, N.C. 28247-2287 USA
Fax: (704) 542.1564
Orders: (800) 420-2080
How to make a ballet tutu: