(1991). The World book health and medical annual 1991. World book.
Chicagoスタイル(17版)引用形式The World Book Health and Medical Annual 1991. Chicago: World book, 1991.
MLA(9版)引用形式The World Book Health and Medical Annual 1991. World book, 1991.
警告: この引用は必ずしも正確ではありません.