Gaya APA
Longman dictionary of 20th century biography. Consultant editor: Asa Briggs, ed. by Alan Isaacs & Elizabeth Martin. . (1985).
Essex:
Longman.
Gaya MLA
Longman dictionary of 20th century biography. Consultant editor: Asa Briggs, ed. by Alan Isaacs & Elizabeth Martin. .
.
Essex:
Longman,
1985.
Buku.