एपीए उद्धरण

(1969). 1969 yearbook covering the year 1968. New York: Crowell-Collier.

शिकागो स्टाइल उद्धरण

1969 Yearbook Covering the Year 1968. New York: Crowell-Collier, 1969.

एमएलए उद्धरण

1969 Yearbook Covering the Year 1968. New York: Crowell-Collier, 1969.