Gaya APA
BOEN, B. (2013).
TOP Words, A series of bestselling book of ''Young On Top'' (Cetakan Pertama).
Yogyakarta:
Penerbit B first.
Gaya MLA
BOEN, BILLY.
"TOP Words, A series of bestselling book of ''Young On Top''".
Cetakan Pertama
Yogyakarta:
Penerbit B first,
2013.
Pengembangan Diri.