Gaya APA

Lewis, P. (1971). Library trends= a publication of the univsity of illinois graduate school of library science volume 19 (Jilid 19). U. S. A.: .

Gaya MLA

Lewis, Philip. "Library trends= a publication of the univsity of illinois graduate school of library science volume 19". Jilid 19 U. S. A.: , 1971. Text.