एपीए उद्धरण

DOERFFER, P., & SZWABA, R. (2008). FOREWORD. Gdańsk University of Technology.

शिकागो स्टाइल उद्धरण

DOERFFER, PIOTR, और RYSZARD SZWABA. FOREWORD. Gdańsk University of Technology, 2008.

एमएलए उद्धरण

DOERFFER, PIOTR, और RYSZARD SZWABA. FOREWORD. Gdańsk University of Technology, 2008.