APA
Joen P. H. &. P. R., . (1990). Flexural strength & ductility analysis of spirally reinforced prestressed concrete piles. New Zealand: Civil Engineering University of Caterburry.
Chicago
Joen Pam Hoet & Park Robert, . 1990. Flexural strength & ductility analysis of spirally reinforced prestressed concrete piles. New Zealand: Civil Engineering University of Caterburry.
Harvard
Joen P. H. &. P. R., . (1990). Flexural strength & ductility analysis of spirally reinforced prestressed concrete piles. New Zealand: Civil Engineering University of Caterburry.
MLA
Joen Pam Hoet & Park Robert, . Flexural strength & ductility analysis of spirally reinforced prestressed concrete piles. New Zealand: Civil Engineering University of Caterburry. 1990.