APA Style

Hargreaves, Roger. (). Mr. Grumble . : .

Chicago Style

Hargreaves, Roger. Mr. Grumble. : , . Printed Book.

MLA Style

Hargreaves, Roger. Mr. Grumble. : , . Printed Book.

Turabian Style

Hargreaves, Roger. Mr. Grumble. : , . Printed Book.