APA Style

ZIEFERT, H. (1987). NICKY UPSTAIRS AND DOWN / PUFFIN EASY TO READ LEVEL 1 . NEW YORK: PENGUIN GROUP.

MLA Style

ZIEFERT, HARRIET. "NICKY UPSTAIRS AND DOWN / PUFFIN EASY TO READ LEVEL 1". NEW YORK: PENGUIN GROUP, 1987. Text.