(1990). A user's manual for a method of map scanning and digital editing for thematic map production and data-base construction. U.S. Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)A User's Manual for a Method of Map Scanning and Digital Editing for Thematic Map Production and Data-base Construction. Washington, DC: U.S. Gov. Print. Off, 1990.
MLA-Zitierstil (9. Ausg.)A User's Manual for a Method of Map Scanning and Digital Editing for Thematic Map Production and Data-base Construction. U.S. Gov. Print. Off, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.