APA

National Federation of Building Trades Employers, . (1978). Sub-contract (non-nominated) .... approved by the National Federation of Building Trades Employers, the Federation of Associations of Specialists and Sub-Contractors, the Committee of Associations of Specialist Engineering Contractors. London: National Federation of Building Trades E.

Chicago

National Federation of Building Trades Employers, . 1978. Sub-contract (non-nominated) .... approved by the National Federation of Building Trades Employers, the Federation of Associations of Specialists and Sub-Contractors, the Committee of Associations of Specialist Engineering Contractors. London: National Federation of Building Trades E.

Harvard

National Federation of Building Trades Employers, . (1978). Sub-contract (non-nominated) .... approved by the National Federation of Building Trades Employers, the Federation of Associations of Specialists and Sub-Contractors, the Committee of Associations of Specialist Engineering Contractors. London: National Federation of Building Trades E.

MLA

National Federation of Building Trades Employers, . Sub-contract (non-nominated) .... approved by the National Federation of Building Trades Employers, the Federation of Associations of Specialists and Sub-Contractors, the Committee of Associations of Specialist Engineering Contractors. London: National Federation of Building Trades E. 1978.