World Book, Inc. (1990). Christmas in the Philippines: Christmas around the world from World Book. World Book.
Chicago-viite (17. p.)World Book, Inc. Christmas in the Philippines: Christmas Around the World from World Book. Chicago: World Book, 1990.
MLA-viite (8. p.)World Book, Inc. Christmas in the Philippines: Christmas Around the World from World Book. World Book, 1990.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.