Humphrey, G. (1923). Stories of the world's holidays. Milton Bradley Company.
Chicago-viite (17. p.)Humphrey, Grace. Stories of the World's Holidays. Massachusetts: Milton Bradley Company, 1923.
MLA-viite (9. p.)Humphrey, Grace. Stories of the World's Holidays. Milton Bradley Company, 1923.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.