1 2 3 4 Wright, John W. (ed.) (2006). The New York Times Almanac (2007 ed.). New York, New York: Penguin Books. p. 64. ISBN0-14-303820-6. Unknown parameter |coauthors= ignored (|author= suggested) (help)CS1 maint: Extra text: authors list (link)
↑ Wright, John W. (ed.); Editors and reporters of The New York Times (2006). The New York Times Almanac (2007 ed.). New York, New York: Penguin Books. หน้า. 64. ISBN 0-14-303820-6.
