APA (7e ed.) Bronvermelding

Institution, 8. B. S. Steel railway sleepers for flat bottom rails.

Chicago (17e ed.) Bronvermelding

Institution, 8096 British Standards. Steel Railway Sleepers for Flat Bottom Rails.

MLA (9e ed.) Bronvermelding

Institution, 8096 British Standards. Steel Railway Sleepers for Flat Bottom Rails.

Let op: Deze citaties zijn niet altijd 100% accuraat.