APA Style

Lee, Helen. (2005). Energy: Lower Block(Primary 3 & 4) . Singapore: Educational Publishing House PTE Ltd.

Chicago Style

Lee, Helen. Energy: Lower Block(Primary 3 & 4). Singapore: Educational Publishing House PTE Ltd, 2005. Book.

MLA Style

Lee, Helen. Energy: Lower Block(Primary 3 & 4). Singapore: Educational Publishing House PTE Ltd, 2005. Book.

Turabian Style

Lee, Helen. Energy: Lower Block(Primary 3 & 4). Singapore: Educational Publishing House PTE Ltd, 2005. Book.