Gaya APA

Goodell, R. (2020). Ebook Penjas. Official Playing Rules of the National Football League, Roger Goodell . : The National Football League. All rights reserved. Printed in the United States of America..

Gaya MLA

Goodell, Roger. "Ebook Penjas. Official Playing Rules of the National Football League, Roger Goodell". : The National Football League. All rights reserved. Printed in the United States of America., 2020. Text.