Gaya APA

Hayford, J., Barna, G. (2015). Leaders On Leadership (The Leading Edge Series) : wisdom, advice and encouragement on the art of leading god's people (Trawas) . Malang: Gandum Mas.

Gaya MLA

Hayford, Jack., Barna, George. "Leaders On Leadership (The Leading Edge Series) : wisdom, advice and encouragement on the art of leading god's people (Trawas)". Malang: Gandum Mas, 2015. Text.