APA Style
Perring, F., Walters, ,. (1989).
The Macmillan field guide to British wildflowers .
London:
The macmillan press ltd.
MLA Style
Perring, Franklyn., Walters, ,Max.
"The Macmillan field guide to British wildflowers".
London:
The macmillan press ltd,
1989.
Text.