Gaya APA
Leo, B., Ishak, P, :, Z. (2019).
The Miracle Of Fokus : Keajaiban Fokus (Cet 1).
Yogyakarta:
Bright Publisher.
Gaya MLA
Leo, Babauta., Ishak, Penerjemah, :, Zulkarnaen.
"The Miracle Of Fokus : Keajaiban Fokus".
Cet 1
Yogyakarta:
Bright Publisher,
2019.
Reference.