Blackwood P., S. M. (1956). The World and its wonders: In six Vol. McGraw-Hill.
Чикаго маягийн жагсаалтBlackwood P., Stephens M.M. The World and Its Wonders: In Six Vol. Chicago: McGraw-Hill, 1956.
MLA ишлэлBlackwood P., Stephens M.M. The World and Its Wonders: In Six Vol. McGraw-Hill, 1956.
Warning: These citations may not always be 100% accurate.