Gaya APA
Keller, J. (1655).
Make each day count: A Christopher thought for every day of the year. .
New York:
New York The Christophers Inc.
Gaya MLA
Keller, James.
"Make each day count: A Christopher thought for every day of the year. ".
New York:
New York The Christophers Inc,
1655.
Buku.